We performed a neutron-scattering experiment to investigate the effect of distortion of CuO2 planes on the low-energy spin correlation of La1.94 - x Srx Ce0.06 CuO4 (LSCCO). Due to the carrier-compensation effect by co-doping of Sr and Ce, LSCCO has a smaller orthorhombic lattice distortion compared to La2 - x Srx CuO4 (LSCO) with comparable hole concentration p. A clear gap with the edge-energy of 6-7 meV was observed in the energy spectrum of local dynamical susceptibility χ″ (ω) for both x = 0.18 (p ∼ 0.14) and x = 0.24 (p ∼ 0.20) samples as observed for optimally doped LSCO (x = 0.15 - 0.18). For the x = 0.14 (p ∼ 0.10) sample, in addition to the gap-like structure in χ″ (ω) we observed a low-energy component within the gap which develops below 2 - 3 meV with decreasing the energy. The low-energy component possibly coincides with the static magnetic correlation observed in this sample. These results are discussed from a view point of relationship between the stability of low-energy spin fluctuations and the distortion of CuO2 planes.
|Number of pages||3|
|Journal||Journal of Physics and Chemistry of Solids|
|Publication status||Published - 2008 Dec|
- C. Neutron-scattering
ASJC Scopus subject areas
- Materials Science(all)
- Condensed Matter Physics